/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.it.mqtt;

import org.apache.iotdb.commons.path.PartialPath;
import org.apache.iotdb.db.engine.trigger.sink.mqtt.MQTTConfiguration;
import org.apache.iotdb.db.engine.trigger.sink.mqtt.MQTTEvent;
import org.apache.iotdb.db.engine.trigger.sink.mqtt.MQTTHandler;
import org.apache.iotdb.it.env.ConfigFactory;
import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.fusesource.mqtt.client.QoS;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.sql.*;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

@RunWith(IoTDBTestRunner.class)
@Category({ClusterIT.class})
public class IoTDBMQTTSinkIT {

    private boolean enableMQTTService;

    @Before
    public void setUp() throws Exception {
        enableMQTTService = ConfigFactory.getConfig().isEnableMQTTService();
        ConfigFactory.getConfig().setEnableMQTTService(true);
        EnvFactory.getEnv().initBeforeTest();
    }

    @After
    public void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterTest();
        ConfigFactory.getConfig().setEnableMQTTService(enableMQTTService);
    }

    @Test
    public void onEventUsingSingleSensorHandler() throws Exception {
        MQTTHandler mqttHandler = new MQTTHandler();
        mqttHandler.open(
                new MQTTConfiguration(
                        "127.0.0.1",
                        EnvFactory.getEnv().getMqttPort(),
                        "root",
                        "root",
                        new PartialPath("root.sg1.d1"),
                        new String[]{"s1"}));

        for (int i = 0; i < 5; ++i) {
            mqttHandler.onEvent(new MQTTEvent("test", QoS.EXACTLY_ONCE, false, i, i));
        }

        mqttHandler.close();

        TimeUnit.SECONDS.sleep(10);

        assertEquals(5, checkSingleSensorHandlerResult());
    }

    private int checkSingleSensorHandlerResult() {
        int count = 0;
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            try (ResultSet resultSet = statement.executeQuery("select * from root.**")) {

                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();

                checkHeader(
                        resultSetMetaData,
                        "Time,root.sg1.d1.s1,",
                        new int[]{
                                Types.TIMESTAMP, Types.FLOAT,
                        });

                while (resultSet.next()) {
                    for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                        assertEquals(count, Double.parseDouble(resultSet.getString(i)), 0.0);
                    }
                    count++;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
        return count;
    }

    @Test
    public void onEventUsingMultiSensorsHandler() throws Exception {
        MQTTHandler mqttHandler = new MQTTHandler();
        mqttHandler.open(
                new MQTTConfiguration(
                        "127.0.0.1",
                        EnvFactory.getEnv().getMqttPort(),
                        "root",
                        "root",
                        new PartialPath("root.sg1.d1"),
                        new String[]{"s1", "s2", "s3", "s4", "s5", "s6"}));

        for (int i = 0; i < 5; ++i) {
            mqttHandler.onEvent(
                    new MQTTEvent(
                            "test",
                            QoS.EXACTLY_ONCE,
                            false,
                            i,
                            i,
                            (long) i,
                            (float) i,
                            (double) i,
                            i % 2 == 0,
                            String.valueOf(i)));
        }

        mqttHandler.close();

        TimeUnit.SECONDS.sleep(10);

        assertEquals(5, checkMultiSensorsHandlerResult());
    }

    private int checkMultiSensorsHandlerResult() {
        int count = 0;
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet = statement.executeQuery("select * from root.**")) {

                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();

                checkHeader(
                        resultSetMetaData,
                        "Time,root.sg1.d1.s1,root.sg1.d1.s2,root.sg1.d1.s3,"
                                + "root.sg1.d1.s4,root.sg1.d1.s5,root.sg1.d1.s6,",
                        new int[]{
                                Types.TIMESTAMP,
                                Types.FLOAT,
                                Types.FLOAT,
                                Types.FLOAT,
                                Types.FLOAT,
                                Types.BOOLEAN,
                                Types.FLOAT,
                        });

                while (resultSet.next()) {
                    for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                        try {
                            assertEquals(count, Double.parseDouble(resultSet.getString(i)), 0.0);
                        } catch (NumberFormatException e) {
                            assertEquals(count % 2 == 0, Boolean.parseBoolean(resultSet.getString(i)));
                        }
                    }
                    count++;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
        return count;
    }

    private void checkHeader(
            ResultSetMetaData resultSetMetaData, String expectedHeaderStrings, int[] expectedTypes)
            throws SQLException {
        String[] expectedHeaders = expectedHeaderStrings.split(",");
        Map<String, Integer> expectedHeaderToTypeIndexMap = new HashMap<>();
        for (int i = 0; i < expectedHeaders.length; ++i) {
            expectedHeaderToTypeIndexMap.put(expectedHeaders[i], i);
        }

        for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
            Integer typeIndex = expectedHeaderToTypeIndexMap.get(resultSetMetaData.getColumnName(i));
            Assert.assertNotNull(typeIndex);
            Assert.assertEquals(expectedTypes[typeIndex], resultSetMetaData.getColumnType(i));
        }
    }
}
